Locomotive-arch.



E. P. STEVENS. LOCOMOTIVE ARCH. K nrrucmou men IN]. 81. ms may!!! gnu.f9. ms.

Patented June 12,1917.

fiSHEETF-SHEETI.

UNITED STATES PATENT OFFICE.

ENOCH P. STEVENS, OF CHICAGO, ILLINOIS, ASSIGIVOR, BY MESNE ASSIGNMENTS,TO AMERICAN ARCH COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

Specification of Letters Patent.

LOCDMO'IIVE-ARCH.

Patented June 12, 1917.

Application filed March 31, 1913, Serial No. 757,822. Renewed January10, 1916. Serial No. 71,378.

To all whom it may concern:

Be it known that I, ENOOIX I. S'rnvnNS, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Locomotive-Arches, ofwhich the following is a specification.

My invention relates to arches of refractory fire'brick used in thefire-boxes of locomotives. The particular style of arch which forms thesubjectonatter of my invention is of the type usually known as the frontarch, this arch being supported on arch tubes extending longitudii'iallythrough the firebox and sloping downwardly from the rear of the fire-boxto the lower portion of the :fine-sheet.

Heretofore two principal types of front arches supported on arch tubeshave been in which a portion of the space between each of the outer arch1 .tubes and the side sheet of the fire-box was filled by extensions ofthe bricks forming the two outer rows of the arch, each of these rowsbeing supported on two arch tubes; second, arches in .which there wereseveral rows of bricks each supported between adjacent arch tubes (thusforming three rows of bricks it four arch tubes .wcre used), and

separate side rows of bricks between the outcrmost arch tubes andrespective side sheets, these side bricks being supported by the jointaction of the side sheets and the outer arch tubes or the. brickssupported thereon.

It has been found by experience that there are marked disadvantagesabout each form of arch which I have just described. In the first typeof arch itis necessary to employ bricks of great length which aredifficult to handle and very liable to'breakage. In arches of the secondtype the vibration of the side sheets is transmitted through thesidebricks to the arch, and causes undue.

vibration of the latter, while at the same time the side rows of bricksare very apt to become displaced at one end or the other and fall downonto the bed of fuel.

In my improved form of arch I avoid the difiicultics of both types ofarches which have been described above. 1 employ a plurality of mainrows of bricks, the bricks of each tow being supportedat their oppositecndsdrv arch ti1l')cs,.c:ich row of bricks being substantially the widthof the space between adjacent tubes. In this win; I am able to employbricks of such dimensions that they are not liable to breakage. The siderows of, bricks which partially till the spaces between the outer archtubes and the side sheets constitute what I term the canta liver bricks,since these latter bricks are supported by the adjacent main rows ofbricks or by the joint action of such bricks and the outer arch tubes,and a e not supported by nor do they rest againsxliesidc sheets of thefire-box. It will be evident that as the side bricks are supported intiis manner they constitute cantaliver structures, In this way thetransmission of the vibrations of the side shect-s'to the arch isavoided, and, moreover, the chance of having the bricks displaced andfall down onto the fuel bed-is greatly decreased.

These and other advantages of my invention will be more readilyunderstood by reference to the accompanying drawings, which showpreferred embodiments of my invention, and in which:

Figure 1 is a vertical transverse section through a locomotive fire-box,taken on the line 1-1 of Fig. 2;

Fig. 2 is a vertical longitudinal section through the fircbox, taken onthe line 2-2 illustrated in Fig. 3;

Fig. fi-is a perspective of a side brick used in the arch constructionshown in Fig. 3;

Fig. 7 is a section similar to Fig. 3 but showing a modified formofiarch construction;

Fig. 8. is a fragmentary plan of a second modified form of archconstruction; and,

Fig. 9 is a vertical transverse section, taken on the line 9-9 of Fig.8: a

The arch tubes 20, of which there? re generally four, extendlongitudinally hrongh the fire-box 21, sloping downwardly from the waterleg 22 at the rearof the fire-box to the water leg 23 at the frontthereof. The sheet 24 to which the front ends of the tubes '20 areattached constitutesthe rear. flue-sheet of the locomotive.

side sheets 25 outside of which are the water form .of construction.

legs 26. At the topcf the fire-box the side sheets are joined to formthe crown sheet 27.

.In the form of arch illustrated in Figs. 1 to 0, inclusive, the centralrow of bricks .28 is supported at its edges by the two central archtubes 20. These bricks 23 are of well-known shapes and functions andfit- '31, which -is preferably of approximately half the total width ofthe body of the brick.

The under surface of the-tongue 31 has the socket 32, which engages theouterarch tube 20. It is evident that a -portion of this tongue extendslaterally slightly beyond the outer arch tube, as clearly illustrated inFigs. 1, 3 and 4. 31 is provided with a. groove 33. As best shown inFig. .4, when the bricks 29 are placed in position, a space is leftbetween the adjacent tongues 31, this space being approximately the samewidth as that of one of the tongues 31.

The shape of. the cantaliver bricks of the side rows is best shown inFig. ('3. Each brick.34 has a body portion 35, which preferably extendsupwardly toward the side sheet and gradually tapers toward. said sheet.Integral with the body portion 35 is the tongue-36, having on itsbottom'the semicirdular groove 37 adapted ,to engage an outer arch'tubc20. On the sides of the tongue 36 are the locking ribs 38. As shown inFigs. 1, 3 and 4, the tongue 36 of. each of the cantaliver bricks 34 isplaced in position between the tongues 31 of the bricks 29, the lockingribs 38 engaging the grooves 33 of the tongues 31. In this way thecantalivcr bricks 34 are securely held in position. The outer edges ofthese bricks 34 are clear of thc-side sheets 25, thus preventing thetransmission of vibration from the side sheets to the arch. If desired,the corners of theside or marginal bricks may be. cut

off, as shown in Fig. 8, thereby providing more space 'in certainportions between the side bricks 34 and the side sheets 25. This isoften of advantage to prevent the accu nnrlation of cinders on the architself.

In Fig. I have shown a slightly modified In this case the arch is madeup of a pair of rows of the bricks 30, thebricks of each of these rowsresting on the two outer arch tubes. The bricks 39 are upwardly beveledon their inner ends, and

between them is' supported a row of wedge.

shaped bricks 40, having downwardly beveled ends which rest against thecorrespondbeveled ends of the bricks 39. The outer Each side of thetongue ends of bricks 3.) are formed with tongues 41 corrcspomling tothe tongues ifil oi' the bricks 25), formerly described. In this styleof arch the cantaliver bricks 34 are of e.\'- actly the same shape asdescribed in connection with the arch illustrated in Figs. 1 to (i,inclusive. :Thc cantalivcr bricks are curcly locked in position, and thesocketor groove 37 in the tongue 36 of each of the cantaliver bricksserves to prevent lateral movement of the arclr'asa whole, and alsoprevents spreading of the bricks 39 by reason of the \vedging action ofthe bricks 40.

In Figs. 8 and 9 I have illustrated another n'iodified form ofconstruction for the cantaliver bricks and the bricks of the rowsimmediately adjacent to the cantaliver bricks. Each of the bricks 42 ofthis form of arch rests on two of the outer arch tubes 20, the bottomsof the bricks preferably being on a line with the upper surface of thearch tubes, although if desired bricks may be used which have sockets intheir edges. and so fit down between the arch tubes, in the mannerillustrated in Fig. 3.

Each of the bricks 42 has a tongue 43 which rests directly'on an archtube 20. On each side, ofthe brick between the tongue 43 and the edge ofthe brick is provided a bevclcd Surface 44, while the outer edge of the.tongue 43 is provided with the ledge 45.

which preferably slopes inwardly, for the of the tongue 47 is providedwith a beveled surface '48 adapted .to engage the beveled surfaces 4.4of two adjacent bricks 42. Be-

tween the tongue 47 of each side brick 46' and the edges of the brickare provided the abutrncnts 49 adapted to rest on the-ledges 45 of thebricks 42. On account of the fact that the ledges 45 slope inwardly,they serve as locking means for preventing outward movement of thecantaliver bricks 46. 'On' the bottom of each brick 46 is preferablyprovided a lug 50 which engages the arch tube 20 and. prevents outwardmovement of the bricks 42 and the side bricks 46, the bricks 46 on thetwo sides of the arch thereby sccurely locking the latter in position.In installing the, arch it will be evident that the bricks 42am firstplaced -in position, and the cantaliver bricks 46 may then be readilyadjusted.

It will be apparent to those skilled in the art that many changes can bemade in the detailed construction of the arch which I have described.without departing from the spirit or scope of my invention. i

a The several modifications of iny invention which are embraced in andsuggested by the structures disclosed in Figs. 8 and 9 of the drawingsare not specifically claimed in this application, but constitute thesubject matter oi a divisional application, Serial Number 77,647, filedFebruary llth, 1916.

What I. claim is:

1. In a locomotive arch onstruction, the combination with a fire-boxhaving, a pinrality of arcli tubes extending th'erethrough, ot' aplurality of rows of bricks supported on 1; said tubes. and a row ofcantalivcr bricks extending into the space between each of the outertubes and the. side sheets of the firebox. said cantaliver bricks beingout of contact with said side sheets, substantially as described.

In a locou'iotive arch construction, the.

combination with a lire-box havinga plurality of arch tubes extendingtherethrough, of a plurality of main rows of bricks supported :Ull saidtubes, and -a row of cantaliver bricks extending into the space betweeneach of the ou icr tubes and the side sheets of the firebox, each ofsaid cantaliver bricks being supported by the joint action of the bricks2; of the adjacent main row and an outer arch tube and being out ofcontact with said side sheets, substantially as described.

In a locomotive arch construction, the combination with a fire-boxhaving a plurality of arch tubes extending therethrough,

of a plurality of main rows of bricks supported on said tubes. :1. rowof cantaliver bricks extending into the space between each of the outertubes and the side sheets ofthe v firesbox. each of said cantaliverbricks hav ing a tongue extending therefrom, and means for forminglocking engagement between said tongue and the bricks of the adjacentmain row. substantially as described. i. In a locomotive archconstruction, the

:ombiuation with a lire-box having a .plurality of arch tubes extending:thercthrough, of a plurality of main rows of bricks supiorted on saidtubes. and a row of cantaliver bricks extending into the space betweeneach of the outer tubes and the side sheets of the tire-box, each ofsaid cant-aliver bricks engaging the bricks of the adjacent main row andbeing'out of contact with said side sheet, substantially as described.

I. In a locomotive arch construction, the combination with a fire-boxhaviu; a plurality of arch tubes extending therethi-ough, of a pluralityof rows of bricks supported on said tubes, a row of cantalivcr bricksextendim into the space between each of the outer to ;es and the sidesheets of the. fircbox, said cautaliver bricks bein; out of con tactwith said side sheets. and means for preventing, lateralmovemcnt of saidarch,

substantially as described.

6. In a locomotive arch construction, the combination with. a fire-boxhaving: a plurality of arch tubes extending therethrougli.

of a plurality of main rows of bricks supported on said tubes, a row ofcantaliver bricks extending into the space between each of theouter-tubes and the side sheets of the tire-box, each of said cantalivrbricks engaging the bricks'of an adjacent main row and being out ofcontact with said'side sheets, and means for preventing lateral movementof said arch, substantially as deseribedk 7. In a locomotive archconstruction, the combination with a firebox having support ing meansextending therethrough, of a. main brick resting on said supportingmeans, and'a cantaliver brick having locking engagement with saidniainbrick.

8. In a locomotive arch construction, the combinationwith a fireboxhaving a plu- 'ality of arch tubes extending lon 'tudinallythercthrough, of a main bric sup: ported on said tubes, a can'tsiliverbrick ex 5 tending into'the space between one of said tubes and. theside sheet of the firebox, and means for forming-lockingengagementbetween. said main brick and said can'taliver brick.

9. In a. locomotive arch construction, a firebox and its side sheets anda plurality: of

arch tubes some of which substaiitially parallel said side sheets, incombination with a main arch brick having its outerend on one of'saidtubes adjacent saidside sheet and a cantaliver brie-k extending from theend of said main brick nearly across the space between said tube andside sheet and positively held out of contact with said side sheet. 7 iv 10. In a locomotive arch construction afire-box sidesheet, and an archtube substantially paralleling the same, in combination witha main archbrick having its outer 10F and supported by said tube, a secondbrickextending, therefrom substantially across the space between said sheetand tub, the ends of said bricks being interlocked in a manner topositively hold the free end of the 119 second brick out of contact withsaid side sheet.

11. In a locomotive arch construction. a tire-box side sheet andanareh-tube sub:

'stantially paralleling the same, in combination with a mainarch brickhaving its outer end supported by said. tube, a second brick extending:therefrom substantially across the space between said sheet and tube,the ends of said'bricks being separatelv interlocked 12 in a manner topositively hold the free em] of the second brick out of contact withsaid' side sheet.

12. In a locomotive arch eonstruetion'a tire-box side sheet and an archtube substan 126 tially paralleling the same, in combination with a mainarch brick having its outer end supported by said tube, a second brickex tending tl'ierctroin substantially across thespace between said sheetand tube, the ref 130 of said bricks being sepa ablv llllt'l'lu-Tlt'ijilin va manner o positively hold the l'ri-c and of arch tube substantiallypa allelinc the same,

in combination with a main arch brick and a cantaliver brick .bothresting upon said tube and both interlocked tlicrcwitln and meansdctachably but rigidly joining the ends of said bricks, irhereby saidcantalircr brick is held in fixed'rclation to said brick said tube andsaid sheet.

14. In a locomotive arch construction, two main bricks arranged side byside as upon an arch tube, in combination with a cantaliver brickha\'in;, its end in abutment ith both said main bricks and said bricksbeing provided with rannnlenicntarv tongues, which are interlock-ml andlix the relations of said main and cantalircr bricks.

15. in a' lrn-omotire arch coi'istruction, two main bri ks arranged sideby side as upon an archtnlic, in combination with a cantalirer brickhaving its end in abutment with lJUlll lhcreol'. all said bricks beingprovided with ron'inlcnicntary tongues which are interlocked and fix therelations of said main and caulaliver bricks. and tho undersides of allsaid bricks bring socketed to fit the top of an arch tube.

' EN-OCH P. STEVENS.

Witnesses:

' I-lnxny M. HUXLEY,

L. E. HAN'NEX.

